1289976 has 32 divisors (see below), whose sum is σ = 3283200. Its totient is φ = 422240.

The previous prime is 1289971. The next prime is 1290013. The reversal of 1289976 is 6799821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2^1289976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1641600).

1289976 is an abundant number, since it is smaller than the sum of its proper divisors (1993224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289976 is a wasteful number, since it uses less digits than its factorization.

1289976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 975 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 1289976 is about 1135.7711037000. The cubic root of 1289976 is about 108.8580482482.

The spelling of 1289976 in words is "one million, two hundred eighty-nine thousand, nine hundred seventy-six".